Attachment for window-shade rollers.



I No. 870,625 PATENTED NOV. 12, 1907.

J. L., HARRISON.

ATTACHMENT FOR WINDOW SHADE ROLLERS.

APPLIOATION nun) EAR. 21,1906.

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UNITED STATES JOHN LEEMING HARRISON, OF MONTREAL, QUEBEC, CANADA.

ATTACHMENT FOR WINDOW-SHADE ROLLERS.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed March 21, 1906. Serial No; 307,153.

To all whom it may concern:

Be it known that 1, JOHN LEEMING HARRISON, oi the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Attachments for Window-Shade Rollers, of which the following is a full, clear, and exact description.

My invention relates to a device for raising and lowering roller blinds, and its object is to provide a simple, efficient, and inexpensive attachment by means of which window shades may be adjusted without having recourse to the usual method of pulling upon the blind itself or a tassel attached thereto. This latter method generally results in the blind becoming'soiled, disarranged, or torn, especially when the shade is large and heavy. Moreover, if the window is high, it is often inconvenient to reach the blind. This is especially the case in shop windows where the blinds themselves are at times inaccessible.

My invention eliminates the above difficulties by providing an attachment that can be placed on the end oi'the roller next to the bracket and can be operated to raise and lower the blind by means of a cord, which is suspended in any convenient position.

In the drawings which illustrate my invention Figure l is an elevation of the device. Fig. 2 is a cross section of the same.

Referring to' the parts, A represents a roller of the usual type having a groove or key-way A. B is a spool adapted to fit over the end of the roller and rigidly attached thereto by means of screws or pins. The inner edge of the spool adjacent to the blind, is provided with a vertical integral flange C, while the outer edge is provided with a similar flange D, which is dished or beveled away from the spool, as shown in Fig. 2. The vertical flange 0, adjacent the blind, prevents the latter, when being rolled up, from binding on the spool, while the dished flange D allows the intervening space between the flanges to be increased to admit a greater length of cord. A pin E, fixed in the end of the roller A, fits into the bracket in the ordinary manner. A cord 1, which passes through a suitable opening A in the drum of the spool, is knotted on the interior of said drum, the knot being adapted to lie in the key-way A. The knot thus assists in preventing the spool from turning on the roller and is effectually removed from the drum of the spool. The cord 1. is wound upon the drum of the spool, between the flanges, in a direction opposite to the winding of the shade, and is of such a length as to be always accessible, regardless of the height or position of the shade itself.

To adjust the blind it is only necessary to pull the cord, when the blind will be raised or lowered without the necessity of pulling on the fabric. The leverag obtained is at all times equal to the radius of the roller and increases as the cord is wound upon the spool, thus admitting a free and easy motion of the roller in its bearings.

The device may be readily adjusted to any roller, and its advantage in increasing the life of the blind will be obvious.

Having thus described my invention so that the same may be readily understood by those skilled in the art to which it appertains, what I claim and desire to secure by Letters Patent, is:

The combination of a window shade roller having a longitudinal key-way set therein, a spool adapted to iit over the end of said roller, said spool having a vertical interior flange and a dished exterior flange, means for fastening said spool to the roller, and a Winding cord adapted to pass through an opening in the drum of said spool and having a knot adapted to lie in the key-way of the roller.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

.TOHN LEEMING HARRISON.

Witnesses I). R. MCKENZIE, WiLLIAM C. ARMSTRONG. 

